Improvement in wrenches



EDWARD J. WORCESTER, OE WORCESTER,v MASSACHUSETTS.

Letters Patent No. 108,747, dated October 25, 1870.

Mvc- IMPRGVEMENT IN WRENCHES.

The Schedule referred to in these Letters Patent and making part of the same.

To all .whom it may concern Be it known that I, EDWARD J. WORCESTER, of the city and county of Worcester and State of Massachusetts, have invented certain new and useful Improvements'in Wrenches; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing which forms a Dart of this specification, in whichvFigure l represents a-side view oi' my improved wrench, and i Figure 2 represents a central lon gitndi nal section of the same.

To enable those skilled in the art to which my invention 'belongs to make and use the'same, I will projceed to describe it more in det-ail.

The nature of my invention consists- First, in the combinatiomwith' thc wrench-bar, of a scl'ew-ferrule andstep, provided with` aremovable pintle or bearing for supporting and holding in place ifshellower end of the rosette-screw, as hereinafter-'set ort x. v

Second, in the combination, with the rosette and ferrule of a pintle-screw, as hereinafter described.

In the drawing, the part marked A is the wrenchbar, upon the end of which is formed the outer jaw or head B in the usual manner.

C isthe movable jaw,which is operated by the rosette-screw D.

E indicates the wood handle;

F, the tip-nut; and

G, the ferrule.

The bar A is provided with a screw-thread, b, at its junction with the handle andthe ferrule G, which is also furnished with a screw-thread, c, and is screwed thereon in the manner indicated in the drawing.

The sides of the ferrule are somewhat flattened, so that it can be securely held iu a vise or wrench during the operation of screwing the parts together.

The lower part of the ferrule G is hollowed out to receive the end of thewood handle E', which is made of the usual form and secured by the ordinary tipnut F, screwed onto the lower end of the vbar A.

v The projecting portion or step G', of the ferrule, is drilled through, and tapped to receive a screw, I, which forms the pintle of the rosette D', the point of said screw being turned down to form aA smooth bearing, as indicated. v

The rosette-screw D is arranged in the movable jaw C in the ordinary manner.

By making the parts as herein illustrated, a veryv strong connection is formed between the bar A and ferrule G, so that the latter cannot be vcrowded out of place 'by the pressure of the rosette-screw. D when 'the wrench is in use.

By constructing the wrench as' described, I am enabled to-make the' screw-errule andl the step in one piece. Thiswould not be possible, were not the pintleor bearing for the rosette-screw made adjustable or removable, for in such case it would be impossible to screw up the ferrule so as to cause the pintle to enter and engage with the socket in the lower end of 'the rosette-screw. But by`making the bearing movable this difficulty is avoided, for the ferrule can rst be screwed' up to the proper point on the wrenchbar, and then .the pintle, which until then hasnot.

projected above the face of the step or projection G', K can be turned so as to enterthe socket in the rosettescrew, and thus supportandform the bearing for the latter. And so far as this portion of my invention is concerned, it is manifest that the socket-maybe formed in the removable part I, and the piu on the end of the rosette-screw; or, the rosette-screw bearing I may be otherwise constructed in any suitable manner, provided it is removable from or adjustable in the step G of the ferrule, for the purposes stated. Another advantage is, that the `iaw C can be firmly lockedin any position by simply turning in the screw I, which operation presses the side vof the rosette against the shoulder d, on the bar A, andthereby prevents it from turning.

This latter feature is a great convenience when using a large'number of' bolts with the same-sized heads and nuts.

Having described my improved wrench,

What I claim therein as new and of my invention,f 

